People arriving in the United States during the period known as "New Immigration" (late 19th through early 20th century), would have been most likely to come from which area of the world?

At the beginning of the twentieth century, immigrants arriving in the United States from northern Europe were known as "old immigration" and those from southern and eastern Europe became known as "new immigration."

One of the reasons that favored the new immigration was that in southern and eastern Europe, legal barriers to emigration decreased and there were good rail transport options to shipping ports abroad. This made traveling to America quite affordable. This wave of immigration was characterized by the population movement of more than two and a half million Italians and approximately two million Jews from Russia and Eastern Europe, as well as many Poles, Hungarians, Austrians and Greeks.

The ethnic, cultural and religious differences of the new immigrants led to stigmatization and widespread claims that these people were not fit for working or American citizenship and suffered discrimination.